package com.ilancuo.thinkinjava.chapter_05;

class Book {
    boolean checkedOut = false;

    Book(boolean checkout) {
        checkedOut = checkout;
    }

    void checkIn() {
        checkedOut = false;
    }

    protected void finalize() {
        if (checkedOut)
            System.out.println("Error: checkedOut");
    }
}

public class TerminationCondition {
    public static void main(String[] args) {
        Book novel = new Book(true);
        novel.checkIn();
        new Book(true);
        System.gc();
    }
}
